Reciprocating hydraulic pump.



R. WOOD.

REGIPBOGATING HYDRAULIGPUMP.

APPLICATION IILEDHAR. 20, 1907.

- Patented June 1, 1909'.

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R. WOOD.

REGIPROGATING HYDRAULIC PUMP. APPLICATION FILED MAR. 20; 1907.

Patented June 1, 1909.

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BfiGIPROGATINGIYDBAULIO PUMP. APPLICATION FILED MAR. 20, 1907.

Patented June- 1, 1909. I

y l Q 4 sums-sum 4- ROBERT WOOD, OF BOLTON, ENGLAND.

RECIPROCATING HYDRAULIC PUMP.

Specification of Letters Patent.

Patented June 1, 1909.

I Application filed March 20, 1907. Serial No. 363,479.

To all whom it may concern: 7

Be it known that I, ROBERTWOOD, subject of the King of England, residingat 13 Grafton street, Bolton, in the county of Lancaster, England,engineer, have invented certain new and useful Improvements in orRelating to Reciprocating Hydraulic Pumps, of which the following is aspecification.

This invention relates to improvements in reciprocating hydraulic pumps,and more especially to the reciprocating type such as those particularlyapplicable as force feed lubricators, and it has for its object toprovide an improved pump of this character which may embody one or morerams or plungers and which is capable of adjustment whereby it maycreate a flow of afluid in different quantities and such flow moreoveris positive.

A further object of the invention is to provide pumps or'lubricators ofthis character with a relief valve whereby breakage of the sight feedtube or any other part ofthe mechanism will be avoided should the outletpipe be stopped or clogged;

To these and otherends, the invention consists in certain improvements,and combinations and arrangements of parts, all as will be I hereinaftermore fully described,'the novel features being pointed out particularlyin the claims at the end of the specification. r

In the accompanying drawing: Figure 1 is a side elevation ofa pumpconstructed in accordance with my present invention, the same beingof'the double-acting type and especially adapted for use as a force feedlubricator; Fig. 2 represents a transverse section of the pump orlubricator taken on the line AB of Fig. 1; Fig. 8 is an end view of thepump or lubricator as viewed from the right in Fig. 1 Fig.4 is a topplan view of the lubricator as shown in Fig. 1 and Fig. 5 represents avertical section of the lubricator taken on the line 55 of Fig. 4.

Similar parts are designated by the same reference characters in theseveral views.

The apparatus shown in the acoompanying drawing represents one specificembodiment of the invention, and it will be understood that theinvention is not necessarily limited to the precise construction shown,as certain modifications and changes therein may be made in order thatthe device may be applied to the best advantage in each partlcular case.

In the present embodiment of the inven tion, the apparatus comprises anintermediate tank A which is preferably of glass and in the form of acylinder, a base tank B which is preferably metallic and serves as astand or support for the apparatus and an upper tank 'or cap O which issuperposed on the intermediate tank A. These upper, lower andintermediate tanks are so oined as to provide liquid-tight jointsbetween them, and pillars or supports D serve to secure the severaltanks together.

Obviously, any suitable number of pistons or rams may be used. In thepresent instance, a pair of rams F are employed which are fitted toreciprocate in a common cylinder E, the upper ends of the rams beingprovided with similarly formed forked ends G to cooperate with a pair ofoppositelypositioned crank pins H which are fixed to an operating gearI. A quadrant gear J cooperates with the gear I and is supported on ashaft K which is suitably journaled in the upper tank C. By theaforesaid construction, the rams and their operating mechanism areinclosed within the tanks A and O, the gear I being mounted on a shaft Lwhich is supported by bearings M which depend into the middle tank Afrom the under side of the upper tank 0, and the shaft K for thequadrant J is supported by bearings N formed within the upper tank O.Obviously, a rocking move ment of the quadrant J will causecorresponding. rotation of the gear I in reverse directions and in thismanner the rams F will be reciprocated simultaneously and in reversedirections. Any suitable means may be connected to the shaft K toproduce the necessary rocking movements. I prefer to employ a lever Owhich is keyedor otherwise fixed to the shaft K eXteriorly of the tank Oand also a second lever P which is fulcrumed to the exterior of the basetank B, a block Q being slidably mounted on one of these levers, thelever O in the present instance, while a similar block R is slidablymounted on the lever P, these two blocks having a swivel connection. Thelower end of the leverP is provided with an eye P to which a rod orother equivalent part may be connected whereby oscillatory movement maybe imparted to this lever. Obviously, the rocking movements of the leverP will be communicated through the blocks Q and R to the lever O whichin turn will rock the shaft K, and by shifting the said blockslongitudinally of the respective levers, the are through which the shaftK rotates may be varied and in this manner the length ofthe strokes ofthe rams will also be regulated so that the amount of fluid deliveredfrom the pump may be varied as desired.

The cylinder E carrying the rams depends into the interior of the basetank B and the lower end of each ram chamber is provided with an inlet rwhich is controlled by a check or non-return valve 0. Each ram chamberis also provided with a laterally extending outlet passage m. The outletpassage of each ram chamber leads to a valve casing S which is mountedat the exterior of the base tank B, this valve casing being providedwith an interior chamber m which communicates with an outlet nozzle twhich leads to a sight glass or tube U, the latter connecting the valvecasing S with a second valve casing W, the latter having an outlet ewhich leads into a check valve X. This check valve is provided with adischarge 1) which serves to de liver the liquid into a pipe g which inturn conducts the liquid to the point where it is to be used. The sightglass or tube U is usually filled with water so that the oil dischargingfrom the nozzle t will rise in the form of globules, and the amount ofthe oil or other fluid discharging through the nozzle 25 may beregulated by a valve T which is arranged within the valve casing S andis provided with a threaded stem Z which may be manipulated from theexterior of the said valve casing.

The outlet passage m leading from each ram chamber is also provided witha lateral or branch passage m? which communicates with an upwardlyextending by-passage tube 2, the latter extending upwardly through theintermediate tank A and into the upper tank C and connecting with arelief valve Y which is located within said upper tank C. This reliefvalve embodies a ball a which is normally held seated by means of acompression spring I), the lay-passage z entering below the ball. Anout-let uv also leads from the relief valve casing at a point below theball and into a back pressure valve casing T, the latter having a valveT which is held normally upon its seat by means of a spring T. Thepassage it enters beneath the valve T and an outlet tube It leads fromthis valve casing above the valve T and into the lower part of the checkvalve X at which point such fluid as may flow through the by-passagewill enter the pipe (1. The valve X serves essentially as a check ornon-return valve for the delivery pipe (1. The valve T is preferably soset as to remain closed while the delivery pipe (1 is open orunobstructed, but this valve will open to permit a flow of the fluidthrough the by-passage whenever the back pressure in the delivery pipe qexceeds a given limit in such cases for instance as when the sight glassis cut off by a closing of the valve T. The relief valve Y is set toopen at a somewhat higher pressure than that required to open the valveT so that should the delivery pipe g be obstructed or entirely closed,the relief valve will then open and permit the liquid which ispositively forced by the rams to discharge into the upper tank C fromwhich it flows back through the intermediate tank A and to the base tankB, thereby preventing such a pressure to be developed. as might burstthe sight glass.

Briefly described, the operation of the apparatus is follows: On thedescent of each plunger F, the check valve 0 is closed and oil or otherliquid is forced through the passage m and the nozzle t into the sightglass through which it rises to the casing W and then passes through.the passage '0 and the check valve X and thence to the delivery pipe q.By adjusting the valve T while the oil or other liquid rises in the tubeU, the rate of flow may be varied as desired. Should the delivery pipe gbe partially clogged so as to retard the How of the liquid therethrough,this liquid will then pass from the ram chamber up the by-passage 2,through the bottom of the relief valve, through the back pressure valveT and the discharge pipe h and thence to the check valve X. Should thedelivery pipe Q be wholly stopped by reason of the closure of a stop orother valve therein or from other causes, the relief valve Y will thenopen, permitting the liquid which. is positively forced by the rams todischarge into the upper tank 0 and thence return to the base tank B,bursting of the sight tube or glass U being thereby avoided.

It will be evident from What has been stated that I provide a reservoirprovided with an outlet, and means for filling said reservoir, incombination with a pump for draw ing the contents of said. reservoir andforcing the same through said outlet, together with. means for aeratingsaid pump com arising a rotatably mounted member suc as a toothed gearconnected. with a piston or ram of said pump, an oscillating member suchas a toothed segment continuously engaging said rotatably mountedmember, a rod connected to said oscillating member, and means foroscillating said rod Wherebv said rotatably mounted member isoscillator. The oscillating means in the present instance comprisesblocks suitably mounted on rods or levers, and any suitable means may beused for fixing one of the blocks on its rod or lever when it is desiredto maintain a selected adjustment. It will be apparent further that Iprovide a base reservoir and a main reservoir, the main reservoir beingsuperposed on and communicating with the base reservoir by means ofsuitable perforations so that oil or other liquid can flow from the mainreservoir into the base reservoir. The pump to which I have referredhas, as will be obvious, a valve controlled barrel or cylinder extendingthrough the top of the base reservoir.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declarethatwhat I claim is 1. In a lubricator, the combination with a reservoirprovided with an outlet and means for filling said reservoir, of a pumpfor drawing the contents of said reservoir and forcing same through saidoutlet, and means for operating said pump, comprising a rotatablymounted member connected with the piston of said pump, anoscillatingmember continuously engaging said rotatably mounted memher, arod connected to said oscillating member, and means for oscillating saidrod, whereby said rotatably mounted member is oscillated substantiallyas described.

2. In a lubricator, the combination with a reservoir provided with anoutlet and means for filling said reservoir, of a pump for drawing thecontents of said reservoir and forcing same through said outlet, andmeans for operating said pump, mounted member connected with the pistonof said pump, an oscillating member in operative engagement with saidrotatably mounted member, a rod connected to said oscillating member, apivoted operating rod, and a pivotal connection between said rods,substantially as described.

3. In a lubricator, the combination with a reservoir provided with anoutlet and means for filling said reservoir, of a pump for draw ing thecontents of said reservoir and forcing same through said outlet, andmeans for operating said pump, comprising a rotatably 'n'iounted memberconnected with the piston of said'pump, an oscillating memberinoperative engagement with said rotatably mount ed member, a rodconnected to said oscillating member, a pivoted operating rod, and apivotal connection between said rods, comprising blocks slidably mountedon saidrods,

one of said blocks being providedwith a pivot pin and the other with asocket in operative engagement therewith, substantially as described.

4. In a lubricaton'the combination with a reservoir provided with anoutlet and means for filling said reservoir, of a pump for drawing thecontents of said reservoir and forcing same through said outlet, andmeans for o crating said pump, comprising a rotatab y mounted memberconnectedwith the piston of said pump, an oscillating member in oerative engagement with said rotatably mounted member, 'a rod connectedto said oscillating member, a pivoted operating rod, and a pivotalconnection between said rods, comprising blocks slidably mounted on saidcomprising a rotatablyv matically operated rods, one of said blocksbeing rovid'ed with a pivot pin and the other wit a socket in operativeengagement, substantially as described.

5. In a lubricator, the combination with a reservoir provided with aplurality of outlets and means forfilling said reservoir, of a pluralityof pumps cooperating to draw the contents from said reservoir and forcesame through said outlets, and means for operating said pumps, mountedmember, a pin and slot connection between said rotatably mounted memberand each of said pistons, and an automatically oscillated plate inoperative engagement with said rotatably mounted member, whereby saidrotatably mounted member is oscillated substantially as described.

6. In a lubricator, the combination with a base reservoir, and a mainreservoir superposed on and communicating with same, said base reservoirbeing provided with a to forming the bottom of said main reservoir andsaid top having a conduit therein forming an outlet for said basereservoir, of a pump having a valve controlled barrel proj ectingthrough said top into said base reservoir and forming a communicationbetween said base reservoir and conduit, and an autoplunger for saidpump, substantially as described.

7 7. In a lubricator, the combination with the base reservoir and a mainreservoir su'perposed thereon, said base reservoir being provided with atop forming the bottom of said main reservoir and said top havingapertures therethrough forming a communication between said reservoirs,and also being provided with a plurality of conduits formed therein,comprising outlets for said base reservoir, of a plurality of pumps,having valve controlled barrels projecting through said top into saidbase reservoir and forming communicating passages between said basereservoir and said conduits, plungers for said pumps, and means forautomatically operating said plungers, substantially as described.

8. In a lubricator, the combination with a base reservoir provided witha top having outlet conduits bored'therein and openings through saidtop, of a cylinder seated liquid tight on said top, a hollow coverseated liquid tight on the top ofsaid cylinder and provided withapertures through its bottom, an upright solid member disposed in saidreservoir and said cylinder and provided with valve controlled borestherethrough forming pump barrels communicating with said conduits,plungers contained within said cylinder operating in said barrels fordrawing the liquid from said base reservoirs and forcing same throughsaid outlet conduits, and means for automatically 0 erating said pumps,substantially as descri ed.

.9. The combination of a tank, a pump connected with the tank, means foroperating the pump to cause the same to draw liquid from the tank, mainand by passages both leading from the pump and meeting in a commondelivery pipe, each for conducting liquid from the pump, and a reliefvalve in cooperative relation with one of the passages, said tank beingarranged to remive liquid from the relief valve when the latter isopened 10. A force iced lubri rator comprising a supply tank, a pumpconnected thereto, a delivery pipe for conducting the lubricant to asuitable point for use, a main passage connecting the discharge of thepump and said delivery pipe, and. a b -passage also connecting thedischarge of the pump and said delivery pipe, and a relief valveconnected in the by-passage.

1]. A force leed lubricator com )rising a supply tank, a pump connect-edthereto, a sight feed tube connected to the discharge of said pump andto the delivery ipe, a bypassage pipe also connecting the iseharge oftube and the by-passage fiipe.

eeame said pump and the said delivery pipe, and a reliel valve connectedin the lay-passage pipe.

12. A Force feed lubricator comprising a base tank and a supplementaltank superposed thereon, a pum having an inlet communicating with thease tank, a sight feed tube arranged at the side of the base andsupplemental tanks and connected to receive iluid from said pump, aby-passage pipe also leading from the discharge of said pump and intothe superposed tank, a relief valve connected in the by-passage pipe andadapted When opened to deliver the lubricant into the superposed tank,and a delivery pipe connected to the outlets of both the sight feed Intestimony whereof have hereunto set my hand in presence of twosubscribing Witmesses.

ROBERT "WOOD.

Witnesses EDMUND CHADWICK, J AS. STEWART Bnoanroo'r.

